On 08/06/2016 02:21 AM, Andrea Conti wrote:
Hi,
~ # parted /dev/sde print
Model: WD My Book 1230 (scsi)
Disk /dev/sde: 6001GB
Sector size (logical/physical): 4096B/4096B
[...]
AFAICS this partition works fine, fsck does not report any problem. The
funny thing is, it should not have been possible, because of the 2GB limit
of MBR.
The real limit of MBR is 2^32 sectors, which amounts to 2TB when using
512B sectors. Both your disks are using native 4kB sectors (look at the
logical sector size in the parted output), which effectively raises the
MBR limit to 16TB.
Not that this answers your question, as the Linux kernel has supported
4kB sectors for years and AFAIK it does not need any special
configuration options to do so...
andrea
It's always a good idea to check alignment on the newer disks. Here's a
doc [1]; but it's not always clear how to ensure proper alignment.
Supposidly the newer tools do this automation, but it's not 100%; ymmv.
[1]
https://www.ibm.com/developerworks/linux/library/l-linux-on-4kb-sector-disks/
Many disk are hybrids of the 512/4906 sector size.
hth,
James
